http://www.inter-m.comMADE IN KOREA

NO: 9007979650

SERVICEMANUAL

P O W E R

AMPLIFIERC-800/1200

1

Electrical Adjustment Procedure 1Specifications 2Electrical Parts List 3, 4Top and Bottom View of P.C. Board 5, 6Wiring Diagram 7Block Diagram 8Schematic Diagram 9, 10, 11, 12Exploded View of Cabinet & Chassis / Mechanical Parts List 13, 14Ass’y Drawing 15, 16

CONTENTS

IDLE CURRENT

A. SettingSet the master volume minimum.

B. Connection

C. Adjustment– Adjust SVR101, SVR201 so that the current through the R146, R149, R246, R249 become 10

milliampere.– When that voltage across the Positive “TP” to Negative “TP” becomes 10 millivolt, the current

becomes 21 milliampere.

ELECTRICAL ADJUSTMENT PROCEDURE

TP1 TP2

R146

R246 R249

R149

SVR101 SVR201

AMP B D

VOLT METER

C-800 C-1200Power Output Level

f=1kHz, THD+N≤5% (Typical)STEREO RL=8Ω 250W+250W 350W+350W

RL=4Ω 400W+400W 600W+600WBRIDGED RL=8Ω 800W 1200W

One Channel Drivenf=1kHz THD+N≤5% RL=8Ω 250W 350W

Frequency Response RL=8Ω, P.=1W 0dB+0.5, –1.5dB: f=15~55kHz

Power Bandwidth Half Power, THD+N≤0.1% 10Hz~40kHzSTEREO RL=8Ω

Total Harmonic Distortion (THD+N) f=20Hz~20kHz, Half Power

STEREO RL=8Ω ≤ 0.1%RL=4Ω ≤ 0.1%

BRIDGED RL=8Ω ≤ 0.1%

Channel Separation Half Power RL=8Ω, ≥ 75dBf=1kHz, ATT. max. Input 600Ω shunt

Residual Noise (DIN Audio Filter) ≤ –60dB: ATT min.

Signal-to-Noise Ratio DIN Audio, ≥95dBInput 600Ω Shunt

Damping Factor RL=8Ω, f=1kHz ≥100

Slew Rate 8Ω Full Swing STEREO ±40V/µsBRIDGED

Sensitivity (ATT max.)Rated Power into 4Ω 1kHz 0±2dBm

Voltage Gain (ATT max.) 4Ω 1kHz 33±2dB 35±2dB

Input Impedance (ATT max.) ≥ 20kΩ (Balance/Unbalance)

Indicators Power (Red)Protection (Mute) x 2 (Red)Clip x 2 (Orange)Signal x 4 (Green)

Protection Power SW ON/OFF mutingHeatsink Temp ≥ 100˚C (212˚F)

PC Limiter RL < 2Ω

Fan Circuit –50˚C (122˚F)–60˚C (140˚F)–Low-Speed – Variable – Hi-Speed

Controls (Front) Power SW: Push up On/Push down Off (Rear) Attenuator: Level

Mode SW: Bridged/STEREOLow Cut SW, High Cut SW

Power Source AC 110V–240V, 50/60Hz

Power Consumption 550W 810W

Weight 13.8kg 18.4kg

Dimensions 482(W) 132(H) 369(D) mm

Connectors Input / Output: Barrier Strip

2 3

SPECIFICATIONS ELECTRICAL PARTS LIST

R140 R143 3079101275 RES ERD-2FCVG 101T 1/4W R FR 100R169 R172R175 R178R240 R243R269 R272R275 R278R138 - R139 3079101275 RES ERD-2FCVG 101T 1/4W R(C-1200 ONLY) FR 100R141 - R142 3079101275 RES ERD-2FCVG 101T 1/4W R(C-1200 ONLY) FR 100R238 - R239 3079101275 RES ERD-2FCVG 101T 1/4W R(C-1200 ONLY) FR 100R241 - R242 3079101275 RES ERD-2FCVG 101T 1/4W R(C-1200 ONLY) FR 100R120 - 121 3089100275 RES NFR 10 1/4W J R PHILKO FR 10R220 - 221R122 - 123 3089221275 RES NFR 220 1/4W J R PHILKO FR 220R126 - 129R222 - 223R226 - 229R130 - 131 3089332275 RES NFR 3.3K 1/4W J R PHILKO FR 3.3KR230 - 231R134 R137 3089479275 RES NFR 4.7 1/4W J R PHILKO FR 4.7R168 R173R174 R179R234 R237R268 R273R274 R279R132 - R133 3089479275 RES NFR 4.7 1/4W J R PHILKO(C-1200 ONLY) FR 4.7R135 - R136 3089479275 RES NFR 4.7 1/4W J R PHILKO(C-1200 ONLY) FR 4.7R232 - R233 3089479275 RES NFR 4.7 1/4W J R PHILKO(C-1200 ONLY) FR 4.7R235 - R236 3089479275 RES NFR 4.7 1/4W J R PHILKO(C-1200 ONLY) FR 4.7R114 - 115 3089820275 RES NFR 82 1/4W J R PHILKO FR 82R214 - 215C353 3408210261 CAP RSG 1000UF 35V SNAP 16 P 1000/35C313 - C314 3419010345 CAP HC 10000UF 80V 10000/80C313 - C314 3419510398 CAP AF HM 10000UF 100V 40P LUG(C-1200 ONLY) 10000/100C316 3619474153 CAP POLY TM 0.47UF 250V 474/250VC109 C209 3678050177 CAP M1 DM1 C 050D5 050D5C108 C208 3678220177 CAP M1 DM 5C 220J5 220J5C102 C202 3688471118 CAP MO SR22C 471JA 471JAC105 C205 3698152198 CAP NPP POLY 152J 2J 0.0015MAN106 4355755113 CON ASS Y 4P (360MM TUBE) 4PAN601 4355757008 CON ASS Y 2P 2PCN101 4428595003 LW5267/LWB0640/2.5MM-03P CN201CN102 4428595004 LW5267/LWB0640/2.5MM-04PAN1 4428599003 WAFER YW025-03 YW025-03PF352 5508412234 FUSE TS 20MM 1A/250V U/C/S T1AL/250VRY101 5528007700 RELAY AZ971 - 1A DC24U CR323RY201Q104 Q111 2008206104-T TR PNP KTA 1268BL A 1268Q204 Q211Q102 - 103 2008206106-T TR PNP KTA2400G KEC KTA 2400GQ202 - 203Q105 - 106 2008606108-T TR NPN KTC2240BL (KTC 3200BL) C3200Q110 Q126Q205 - 206Q352Q210 2008606108-T TR NPN KTC2240BL (KTC 3200BL) 2SC 3200R151 R156 3039100575-T RES MO 10 2W JR 10 2WR251 R256R150 R250 3039479575-T RES MO 4.7 2W J RADIAL 4.7 2WVR101 3248347110-T RES SEMI 470 N6S25T1N IDLE 470BVR201C358 3409210071-T CAP AF RSG 10UF 50V 5 P 10/50C106 - 107 3409210141-T CAP AF RSG 100UF 25V 6 P 100/25C114 C206C207 C359C101 C201 3409247041-T CAP AF RSG 47UF 25V 5 P 47/25C115 - 116 3409247131-T CAP AF RSG 470UF 16V 470/16C354 - 357 3509472530-T CAP CE F 0.0047UF 50V Z 0.0047/50C103 - 104 3609104122-T CAP MA 0.1UF 100V J SMALL 0.1M/100C112 - 113 3609104122-T CAP MA 0.1UF 100V J SMALL 0.1M/100C203 - 204 3609104122-T CAP MA 0.1UF 100V J SMALL 0.1M/100C212 - 213 3609104122-T CAP MA 0.1UF 100V J SMALL 0.1M/100C110 - 111 3609222120-T CAP MA 0.0022UF 100V J 0.0022MC210 - 211 3609222120-T CAP MA 0.0022UF 100V J 0.0022M

Ref No. Part No. ValueDescriptionRef No. Part No. ValueDescription

Q107 Q207 2008005999 TR PNP 2SA 1546 NEC 2SA1546Q109 Q209 2008405999 TR NPN 2SC 4001 NEC 2SC4001Q115 Q215 2028107984 TR PNP 2SA 1306A(Y),KTA1659A(Y) KTA 1659AQ121 Q123 2028117994 TR PNP 2SA 1492 W/ACC 2SA 1492Q125 Q221Q223 Q225Q117 Q119 2028117994 TR PNP 2SA 1492 W/ACC(C-1200 ONLY) 2SA 1492Q217 Q219 2028117994 TR PNP 2SA 1492 W/ACC(C-1200 ONLY) 2SA 1492Q108 Q114 2028407990 TR NPN 2SC 3298A(Y),KTC4370A(Y) 2SC 4370Q214Q351 2028407990 TR NPN 2SC 3298A(Y),KTC4370A(Y) KTC 4370Q120 Q122 2028427998 TR 2SC 3856 W/ACC 2SC 3856Q124 Q220 2028427998 TR 2SC 3856 W/ACC 2SC 3856Q116 Q118 2028427998 TR 2SC 3856 W/ACC(C-1200 ONLY) 2SC 3856Q216 Q218Q222 Q224D7 2058100103 DIODE KBPC-2504(SB256)LUG TYPE PBU2504D112 D113 2058100110 DIODE PS2010 PYUNG CHANG PS 2010D212 D213BD351 2058100987 DIODE BRIDGE (KPBP) 152 KPBP 152D114 2058100996 DIODE RECTIFIER LT1N4006(4007) 1N 4006D101 - D109 2058304100 DIODE IN4148 1N 4148D201 - D209D110 - D111 2058322100 DIODE 1SS145 ROHM ISS 142D210 - D211IC101 2118050410 IC TA7317P TOSHIBA TA7317PPO101 2438007994 POSISTOR PTH 59F04 BE471TS 500PO201 PO103 2438009992 POSISTOR P42 T70330 B04200MM 330PO203PO302 2438007995 POSISTOR PTH 9M04 BH 471TS 2FL101 L201 2648099940 COIL INDUCTOR 1.2UM 1.2uHR118 - R119 3002220953 RES CF 22K 1/5W F N 22K 1%R218 - R219R113 R213 3009100973 RES CF 10 1/5W J N 10R106 R206 3009102973 RES CF 1K 1/5W J N 1KR356R155 R158 3009104973 RES CF 100K 1/5W J N 100KR162 R255R258R355 3009122973 RES CF 1.2K 1/5W J N 1.2KR105 R205 3009123973 RES CF 12K 1/5W J N 12KR116 R216 3009182973 RES CF 1.8K 1/5W J N 1.8KR154 R254 3009184973 RES CF 180K 1/5W J N 180KR107 R207 3009221973 RES CF 220 1/5W J N 220R152 R153 3009223973 RES CF 22K 1/5W J N 22KR163 R164R166 R167R252 R253R190 R290 3009224973 RES CF 220K 1/5W J N 220KR101 R201 3009271973 RES CF 270 1/5W J N 270R117 R217 3009471973 RES CF 470 1/5W J N 470R102 R202 3009473973 RES CF 47K 1/5W J N 47KR100 R104 3009561973 RES CF 560 1/5W J N 560R108 R200R204 R208R110 - 111 3009683973 RES CF 68K 1/5W J N 68KR112 R124R125 R210R211 R212R224 R225R103 R203 3009911973 RES CF 910 1/5W 910R103 R203 3009751973 RES CF 750 1/5W(C-1200 ONLY) 750R161 R165 3009822973 RES CF 8.2K 1/5W J N 8.2KR146 R149 3049478783 RES CE 0.47 5W J T HAN NAE 0.47 5WR170 - 171R176 - 177R246 R249R270 - 271R276 - 277R144 - R145 3049478783 RES CE 0.47 5W J T HAN NAE(C-1200 ONLY) 0.47 5WR147 - R148 3049478783 RES CE 0.47 5W J T HAN NAE(C-1200 ONLY) 0.47 5WR244 - R255 3049478783 RES CE 0.47 5W J T HAN NAE(C-1200 ONLY) 0.47 5WR247 - R248 3049478783 RES CE 0.47 5W J T HAN NAE(C-1200 ONLY) 0.47 5W

AMP B’D (4005185301)

0dB=0.775 Vrms, Half Power=1/2 Power Output Level (Rated Power)* Using reactive 2Ω speakers at high power levels may cause overheating, excessive power consumption, and shutdowns.

Please note that below 2Ω the PC limiter will work. Before using 2Ω speakers in a real application, test the system completely.

* Specifications and design subject to change without notice for improvements.

4

Q502 Q504 2008206105-T TR PNP KAT 1268 A1268Q506 Q508R501 - 502 3009152973 RES CF 1.5K 1/5W J N 1.5KR507 - 508R513 - 518R523 - 526R531 - 532R503 R505 3009223973 RES CF 22K 1/5W J N 22KR509 R511R519 R521R527 R529R504 R510 3009221973 RES CF 220 1/5W J N 220R520 R528R506 R512 3009203973 RES CF 20K 1/5W J N 20KR522 R530

C601 3409210171-T CAP AF RSG 100UF 50V 8P 100/50C602 3409210141-T CAP AF RSG 100UF 25V 6P 100/25CN601 4428595003 LW5267/LWB0640/2.5MM-03P 3PD601 D604 2058100996 DIODE RECTIFIER LT1N4006(4007) 1N4006D602 2058502240 DIODE ZENER UZ-24BM(23.1,25.5) UZ 24BMF601 5568224533 CIRCUIT BREAKER W28-XQ1A-10A CIRCUIT BREAKERPO601 - 602 2438200515 THERMISTOR POWER NTC 5D-15 TH5D-15Q601 2028406113 TR NPN KTD 2058Y(D880Y) D2058R603 3009822973 RES CF 8.2K 1/5W J N 8.2KRY601 5528009993 RELAY VH-24H O.E.G/TAKAMISAWA HR-CR6

PT1 2828062300 TRANS POWER C-800 120V(E)PT1 2828062310 TRANS POWER C-800 220V(C)PT1 2828062320 TRANS POWER C-800 230V(B)PT1 2828062330 TRANS POWER C-800 240V(D)PT1 2828062200 TRANS POWER C-1200 120V(E)PT1 2828062210 TRANS POWER C-1200 220V(C)PT1 2828062220 TRANS POWER C-1200 230V(B)PT1 2828062230 TRANS POWER C-1200 240V(D)F1 5568224833 CIRCUIT BREAKER 1.5A C-800 120V(E)F1 5568223733 CIRCUIT BREAKER 8A C-800 220-240V(C,B,D)F1 5568224433 CIRCUIT BREAKER 20A C-1200 120V(E)F1 5568224533 CIRCUIT BREAKER 10A C-1200 220-240V(C,B,D)

Ref No. Part No. ValueDescriptionRef No. Part No. ValueDescription

C301 C302 3509104530-T CAP CE F 0.1UF 50V Z 0.1/50C305 C306C303 - 304 3409210071-T CAP AF RSG 10UF 50V 5P 10/50C307 - 308 3408247171 CAP RSA 470UF 50V SNAP 13P 470/50C309 - 310 3409222171-T CAP AF RSG 220UF 50V SG 10P 220/50C311 - 314 3509103450-T CAP CE 0.01UF 500V Z 0.01CN301 4428595003 LW5267/LWB0640/2.5MM-03P 3PD301 - 304 2058100996 DIODE RECTIFIER LT1N4006(4007) 1N4006F301 - 302 4458999110 FUSE CLIP 5*20 630mAIC301 2168640988 IC 7815 SAMSUNG 7815IC302 2168640987 IC 7915 SAMSUNG 7915

AN401 4355761590 CON ASS Y 2P 2PAN402 4355761425 CON ASS Y INPUT 2P(3P) 3PAN403 4355754804 CON ASS Y 2P-3P 2PC401 - 402 3529560311-A CAP CE SL 56PF 50V J AXIAL 56PC418 - 419C403 - 404 3409247033-T CAP CE SE 47UF 16V 3*5 47/16C409 - 410C416C405 - 406 3609104122-T CAP MA0.1UF 100V J SMALL 0.1(M)C420 - 421C407 - 408 3609473120-T CAP MA 0.047UF 100V 0.047(M)C422 - 423C411 C426 3609153120-T CAP MA 0.015UF 100V J 0.015(M)C412 C427 3609333120-T CAP MA 0.033UF 100V J 0.033(M)C413 - 414 3539103521-A CAP CE YF 10000PF 25V Z AXIAL 0.01C417C424 - 425C429 - C431C415 3529220311-A CAP CE SL 22PF 50V J AXIAL 22PD401 - 404 2058304100 DIODE 1N4148M 1N4148IC401 - 405 2118010590 IC NJM4558D JRC 4558DR401 - 404 3002150953 RES CF 15K 1/5W F N 15K 1%R420 - 423R405 R408 3009180973 RES CF 18 1/5W J N 18R411 R415R419 R424R427 R430R434R406 R409 3002270953 RES CF 27K 1/5W F N 27K 1%R425 R428R407 R410 3002560953 RES CF 56K 1/5W F N 56K 1%R426 R429R412 - 413 3009101973 RES CF 100 1/5W J N 100R431 - 432R414 R433 3001100953 RES CF 100K 1/5W F N 100K 1%R416 - 418 3003470953 RES CF 4.7K 1/5W F N 4.7K 1%R435 - 436SW401 4618999910 SW SS65010-0203-9H-FN Low cutSW403SW402 4618999910 SW SS65010-0203-9H-FN High cutSW404SW405 4625995610 SW SSSU022NB011 (9MM) -LG Bridge monoVR401 - 402 3228083020 VR RK0971110A0113B(ROA33) 10KB

AN504 4355754618 CON ASS Y 2P RED (390M TUBE) 2PAN501 4355754715 CON ASS Y 2P-WHITE(300MM TUBE) 2P 2PAN502 4355755017 CON ASS Y 4P (360MM TUBE) 4PAN503 4355761814 CON ASS Y 3P(4P) 3PC501 - 504 3409222871-T CAP AF RSG 0.22UF 50V 5P 0.22/50D501 - 502 2058304100 DIODE 1N4148M 1N4148LD501 2300052105 LED LTL-307G-041A LITEON SIGNAL 1LD502 2300050105 ED LTL-307E-041A LITEON CLIPLD506LD504 2300050105 ED LTL-307E-041A LITEON PROLD503LD505 2300050105 ED LTL-307E-041A LITEON BRIDGEDLD507 2300050105 ED LTL-307E-041A LITEON POWERLD508 2300052105 LED LTL-307G-041A LITEON SIGNAL 2Q501 Q503 2008606104-T TRNPN KTC 3198Y C3198YQ505 Q507

POWER B’D (4005183750)

INPUT B’D (4005183700)

LED B’D (4005183720)

SW B’D (4005183730)

POWER TRANSFORMER & CIRCUIT BREAKER

5

TOP AND BOTTOM VIEW OF P.C. BOARD

WIRING DIAGRAM

6 7

8

BLOCK DIAGRAM

9 10

SCHEHATIC DIAGRAM

1211

13 14

EXPLODED VIEW OF CABINET & CHASSIS/MECHANICAL PARTS LIST

S6

14

11

10

S4

S6

12

S5

S3

13

S5

15S1

24

17

S6

23

S6

S3

S3

HANDLE 3 SIZE

SCREW BM 3X6N

SCREW #2BTC 3X10B

HEAT SINK (UP)

SCREW BM 4X30B

SCREW BM 3X6B

SW POWER

BRACKET PCB

B.K.T HEAT SINK

LENS LED

MAIN CHASSIS

HEAT SINK (DOWN)

POWER TRANS

DIODE BRIDGE

INPUT B'D

POWER B'D

B.K.T V/R

AC INLET

TOP COVER

SCREW #3BTC 3X6B

SCREW #3BTC 4X8BK

ASS'Y SCREW PM 4X18B

HEX MSPW 3X16Y

SCREW BM 4X12B

S9

S6

S7

S8

16

S5

S3

S2

S4

24

23

S1

22

17

20

18

21

CIRCUIT BREAKER

13

15

14

12

10

11

DC FAN

PCB AMP B'D

5

7

6

3

4

2

9

8

HANDLE BKT

8009130064

8109230103

8109340083

8095996930

8159340103

8

1

4

10

046123495021

4448997410

6505932710

4005183700

4005183750

4005183730

8009140303

8009130063

5568223733

8109330063

8099130161

6

1

1

22

12

4

26

1

1

4

1

1

1

7308998010

7502089520

7308998110

2058100979

6505934810

6535995010

7502089420

8523997210

4625996611

046121676111

2

3

1

1

1

1

1

C-1200

C-800

1

2

1

2

1

1

1

7

PARTS NAME

FRONT PANEL

C-800/1200 EXPLODED VIEW DWG PARTS, LIST

N0

1048602966612

048602966611

PARTS NO

1

1

Q'TY

C-1200

C-800

REMARK

1

2

4

5

6

8

9

7

18

19

20

21

22

25

S3

S3

26

25

4

048603995230

6503986830

C-1200

C-800

1046121676115

LED B'D

LED SPONGE 6735991010 3

1

16

C-800

C-1200

2828063010

2828062910

SW B'D

19

OUTPUT B'D 4005183710 1

4005183720

4005185300

FOOT 6735991210

3

SPONGE FAN 6733996110 1

26

S2

S2

S9

S9

S7

S8

15 16

SIGNALCLIPPROT

POWER

ON

OFF

SIGNAL CLIP PROT

C 1200 POWER AMPLIFIER

POWERPROT

CHANNEL 1 CHANNEL 2

10A / 250VPUSH TO RESET

~AC INPUT

SN

20

-dB

15

1063

0

253040

20

-dB

15

1063

0

253040

INPUTS

GND

GND

40Hz

OFF80Hz

LOW CUT

5kHz

OFF10kHz

HIGH CUT

40Hz

OFF80Hz

LOW CUT

5kHz

OFF10kHz

HIGH CUT

CHANNEL 2CHANNEL 1

GND

GND

BRIDGEDSTEREO

MODELPOWER AMPLIFIER

NO. C-1200

OUTPUT

CHANNEL 1 CHANNEL 2

BRIDGED MONO

MODE

132

280

440

482

2

4

11

10

6 7 8 9

13

5

TOP COVER

046121676113 1

1

MAIN CHASSIS046121676114

046121676115

046121676116

046121676117

1

2

SW POWER 4625996611 134

5

1046123495010

1046121676111

1

1046121676112

HANDLE(3SIZE) 048603995230 2

FRONT PANEL048602966612 1

046121676118 1

C-800

C-1200

C-800 (KOREA)

C-800 (B,C,R 230V)

C-800 (E 120V)

C-800 (D 240V)

C-1200 (KOREA)

C-1200 (B,C,R 230V)

C-1200 (E 120V)

C-1200 (D 240V)

1

1

RemarkNo. Description Part No Q'ty

4448598810 1

5568224533

4465996204

4618999510

3228009017

1

6

7

2

8

9

AC INLET

CIRCUIT BREAKER

10

11

SCREW TERMINAL 4P

SW SLIDE

CONTROL KNOB

SCREW TERMINAL 6P 4465996206 2

5

2

048602966611 1

ASS’Y DRAWING